US5122646A - Electronic fraud detector - Google Patents
Electronic fraud detector Download PDFInfo
- Publication number
- US5122646A US5122646A US07/650,882 US65088291A US5122646A US 5122646 A US5122646 A US 5122646A US 65088291 A US65088291 A US 65088291A US 5122646 A US5122646 A US 5122646A
- Authority
- US
- United States
- Prior art keywords
- channel
- contact elements
- inductive coil
- current
- detecting device
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L23/00—Details of semiconductor or other solid state devices
- H01L23/57—Protection from inspection, reverse engineering or tampering
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K7/00—Methods or arrangements for sensing record carriers, e.g. for reading patterns
- G06K7/0013—Methods or arrangements for sensing record carriers, e.g. for reading patterns by galvanic contacts, e.g. card connectors for ISO-7816 compliant smart cards or memory cards, e.g. SD card readers
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K7/00—Methods or arrangements for sensing record carriers, e.g. for reading patterns
- G06K7/0013—Methods or arrangements for sensing record carriers, e.g. for reading patterns by galvanic contacts, e.g. card connectors for ISO-7816 compliant smart cards or memory cards, e.g. SD card readers
- G06K7/0086—Methods or arrangements for sensing record carriers, e.g. for reading patterns by galvanic contacts, e.g. card connectors for ISO-7816 compliant smart cards or memory cards, e.g. SD card readers the connector comprising a circuit for steering the operations of the card connector
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K7/00—Methods or arrangements for sensing record carriers, e.g. for reading patterns
- G06K7/0013—Methods or arrangements for sensing record carriers, e.g. for reading patterns by galvanic contacts, e.g. card connectors for ISO-7816 compliant smart cards or memory cards, e.g. SD card readers
- G06K7/0086—Methods or arrangements for sensing record carriers, e.g. for reading patterns by galvanic contacts, e.g. card connectors for ISO-7816 compliant smart cards or memory cards, e.g. SD card readers the connector comprising a circuit for steering the operations of the card connector
- G06K7/0091—Methods or arrangements for sensing record carriers, e.g. for reading patterns by galvanic contacts, e.g. card connectors for ISO-7816 compliant smart cards or memory cards, e.g. SD card readers the connector comprising a circuit for steering the operations of the card connector the circuit comprising an arrangement for avoiding intrusions and unwanted access to data inside of the connector
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2924/00—Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
- H01L2924/0001—Technical content checked by a classifier
- H01L2924/0002—Not covered by any one of groups H01L24/00, H01L24/00 and H01L2224/00
Definitions
- the present invention relates to an electronic fraud detector for a device able to read/write electronic cards provided with an electronic circuit and terminals, the device being provided with electrical contact elements and having a slot giving access to a channel wherein the card is inserted to bring the terminals thereof in electric contact with said contact elements.
- a fraud detector including detection means for detecting the presence of an un-authorized electric wire inserted in the channel and which is in contact with said contact elements, is already known in the art, e.g. from the published French patent application 2.554.262.
- the detection means include an electrically conductive plate mounted near to or in the channel so as to detect un-authorized or fraudulent electric wires inserted in this channel by means of the capacitive effect produced between the wire(s) and the plate.
- a drawback of this known fraud detector is that the thickness and the dielectrical properties of the electric insulation as well as the diameter of the conductor forming the fraudulent wire may be such that the value of the capacitance created between this wire and the plate is close to that of a parasitic capacitance so that the detection means and thus also the fraud detector work improperly. Also the position of the wire in the channel may be such that it cannot be detected correctly by these detection means, e.g. when the wire is located too far from the plate.
- An object of the present invention is to provide a fraud detector of the above known type but of which the ability of detecting fraudulent electric wires is improved.
- said detection means are electro-magnetic means including an inductive coil able to detect a current flowing through said electric wire.
- Another characteristic feature of the present fraud detector is that it further includes an AC signal generator for generating said current to be detected.
- the value (amplitude) and frequency of this current can thus be chosen to obtain optimized results from the fraud detector.
- said inductive coil surrounds said channel and is coupled to an amplifier for generating a signal indicative of the detection of said current and thus of the presence of said electric wire.
- the coil surrounds the channel in which the wire is inserted, the position of the latter in this channel has no effect on the accuracy of the detection.
- the device shown in the FIGURE which is for instance a payphone apparatus, has an electrically grounded housing P and is provided with a slot constituting the end of a channel CH into which an electronic card or a chip card FC can be inserted.
- an electronic card generally carries a memory and a microprocessor unit which are integrated thereon.
- the card also has terminals which, when inserted in the channel CH of the apparatus, are brought into electrical contact with contact elements C, and so further to a handling device or control circuit CC via a plurality of interface lines I.
- the control circuit CC of the payphone apparatus can perform different functions amongst which is the reading and writing of the memory built on the electronic card.
- the latter contains a fraud detector able to detect the fraudulent electric wires W inserted in the channel CH.
- the fraud detector is constituted by both a generator G which induces a current in the interface lines I, and a detector D which detects this current when it flows through the fraudulent electric wires W.
- the generator G is constituted by an oscillator OSC which produces an AC signal having a frequency of about 30 MHz and which is coupled to a winding L1 of an inductive coil T1 surrounding the interface lines I.
- the inductive coil T1 has the shape of a ring around the interface lines I and is shown in cross sectional view in the FIGURE.
- the high frequency signal generated in the winding L1 produces a high frequency magnetic field in the inductive coil T1 which in turn induces a high frequency signal on the interface lines I.
- the latter signal or current is superposed to the normal currents on the interface lines I and is such that it does not disturb the normal operation of the payphone apparatus and more particularly of the control circuit CC thereof when a normal electronic card FC is inserted in the channel CH.
- the detector D is constituted by a second inductive coil T2 which surrounds the channel CH and is also shown in a cross sectional view in the FIGURE.
- This second inductive coil T2 is located over the channel CH between the slot and the contact elements C and has a winding L2 connected to an amplifier A.
- the output of this amplifier A is connected to the control circuit CC via an alarm wire AL carrying a like-named signal.
- the detector D is protected against external, e.g. parasitic, magnetic fields, especially those which can be produced by the inductive coil T1, by an electromagnetic shield S connected to the ground and into which the detector D is enclosed.
- the above AC current induced in the interface lines I by the inductive coil T1 flows also through these wires W.
- This current flow is possible because of a parasitic coupling between the part of the wires W external to the payphone apparatus and the grounded housing P of the latter.
- the parasitic coupling is for instance constituted by a parasitic capacitance CP in parallel with a radiation impedance Z1 and with a possible galvanic impedance Z2.
- the AC current flowing through the electric wires W induces a magnetic field in the coil T2 which in turn give rise to a current in the winding L2 thereof. This current is then applied to the amplifier A. If the current in the winding L2 exceeds a predetermined threshold value, the amplifier A produces an alarm signal on the alarm wire AL connected to the control circuit CC.
- the control circuit CC may then for instance inhibit the normal operation of the payphone.
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Artificial Intelligence (AREA)
- Computer Vision & Pattern Recognition (AREA)
- Theoretical Computer Science (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- Computer Hardware Design (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Power Engineering (AREA)
- Control Of Vending Devices And Auxiliary Devices For Vending Devices (AREA)
- Burglar Alarm Systems (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP90200275.7 | 1990-02-06 | ||
EP90200275A EP0447686B1 (fr) | 1990-02-06 | 1990-02-06 | Détecteur électronique de fraude |
Publications (1)
Publication Number | Publication Date |
---|---|
US5122646A true US5122646A (en) | 1992-06-16 |
Family
ID=8204931
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US07/650,882 Expired - Fee Related US5122646A (en) | 1990-02-06 | 1991-02-05 | Electronic fraud detector |
Country Status (4)
Country | Link |
---|---|
US (1) | US5122646A (fr) |
EP (1) | EP0447686B1 (fr) |
AU (1) | AU630526B2 (fr) |
DE (1) | DE69022976T2 (fr) |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5412318A (en) * | 1992-03-17 | 1995-05-02 | Landis & Gyr Business Support Ag | Device for detecting attempts at fraud on an apparatus for reading and writing on a chip card |
US6045043A (en) * | 1996-12-31 | 2000-04-04 | On Track Innovations Ltd. | Contact/contactless data transaction card |
DE19913326A1 (de) * | 1999-03-24 | 2000-10-05 | Giesecke & Devrient Gmbh | Vorrichtung zur Prüfung der Echtheit eines tragbaren Datenträgers |
US6226530B1 (en) * | 1997-08-20 | 2001-05-01 | Schlumberger Systemes | Method of detecting fraud concerning electronic memory cards used in telephony |
US6462554B2 (en) | 2000-02-15 | 2002-10-08 | Intel Corporation | System and method for deterring operation of a system outside a specified frequency range |
EP2722788A1 (fr) * | 2012-10-18 | 2014-04-23 | Wincor Nixdorf International GmbH | Dispositif de lecture d'une carte à puce et procédé de détection d'un module de skimming |
EP3422260A1 (fr) * | 2017-06-29 | 2019-01-02 | NCR Corporation | Détection de manipulation par carte à puce |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2693014B1 (fr) * | 1992-06-26 | 1994-09-30 | Monetel | Détecteur d'utilisation d'une carte à puce fraudulause. |
FR2703486B1 (fr) * | 1993-03-29 | 1995-06-30 | Monetel | Lecteur de cartes a memoire muni d'un detecteur de fraude. |
FR2703487B1 (fr) * | 1993-03-29 | 1995-06-23 | Monetel | Lecteur de cartes à mémoire muni d'un détecteur de fraude magnétique. |
DE4414159C1 (de) * | 1994-04-22 | 1995-07-20 | Siemens Ag | Chipkarten-Leser mit Manipulationserkennung |
IT1268084B1 (it) * | 1994-06-29 | 1997-02-20 | Urmet Spa | Dispositivo e procedimento per rilevare tentativi di frode nei lettori di schede telefoniche del tipo a circuito integrato. |
DE9420257U1 (de) * | 1994-12-17 | 1995-04-20 | CardTec Entwicklungs- und Vertriebsgesellschaft für elektronische Kartensysteme mbH, 44795 Bochum | Lesegerät für Chipkarten |
DE102005043317B3 (de) * | 2005-09-12 | 2007-04-12 | Wincor Nixdorf International Gmbh | Verfahren und Einrichtung zum Erzeugen eines elektromagnetischen Schutzfeldes für ein Kartenlesegerät |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4158434A (en) * | 1969-11-07 | 1979-06-19 | Glen Peterson | Electronic status determining system for goods |
FR2554262A1 (fr) * | 1983-10-28 | 1985-05-03 | Flonic Sa | Dispositif anti-fraude pour lecteur de cartes a memoire electronique |
US4818853A (en) * | 1986-05-26 | 1989-04-04 | Kabushiki Kaisha Toshiba | Data card with inductive signal transfer device |
EP0323347A1 (fr) * | 1987-12-28 | 1989-07-05 | Schlumberger Industries | Dispositif de lecture/écriture pour cartes à mémoire muni d'un dispositif anti fraude |
US4888474A (en) * | 1988-06-08 | 1989-12-19 | Walton Charles A | Proximity identification system with lateral flux magnetic rod coupling |
-
1990
- 1990-02-06 EP EP90200275A patent/EP0447686B1/fr not_active Expired - Lifetime
- 1990-02-06 DE DE69022976T patent/DE69022976T2/de not_active Expired - Fee Related
- 1990-12-27 AU AU68425/90A patent/AU630526B2/en not_active Ceased
-
1991
- 1991-02-05 US US07/650,882 patent/US5122646A/en not_active Expired - Fee Related
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4158434A (en) * | 1969-11-07 | 1979-06-19 | Glen Peterson | Electronic status determining system for goods |
FR2554262A1 (fr) * | 1983-10-28 | 1985-05-03 | Flonic Sa | Dispositif anti-fraude pour lecteur de cartes a memoire electronique |
US4818853A (en) * | 1986-05-26 | 1989-04-04 | Kabushiki Kaisha Toshiba | Data card with inductive signal transfer device |
EP0323347A1 (fr) * | 1987-12-28 | 1989-07-05 | Schlumberger Industries | Dispositif de lecture/écriture pour cartes à mémoire muni d'un dispositif anti fraude |
US4999601A (en) * | 1987-12-28 | 1991-03-12 | Schlumberger Industries | Memory card read/write device provided with an anti-fraud device |
US4888474A (en) * | 1988-06-08 | 1989-12-19 | Walton Charles A | Proximity identification system with lateral flux magnetic rod coupling |
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5412318A (en) * | 1992-03-17 | 1995-05-02 | Landis & Gyr Business Support Ag | Device for detecting attempts at fraud on an apparatus for reading and writing on a chip card |
US5510720A (en) * | 1992-03-17 | 1996-04-23 | Landis & Gyr Business Support Ag | Device for detecting attempts at fraud on an apparatus for reading and writing on a chip card |
US6045043A (en) * | 1996-12-31 | 2000-04-04 | On Track Innovations Ltd. | Contact/contactless data transaction card |
US6226530B1 (en) * | 1997-08-20 | 2001-05-01 | Schlumberger Systemes | Method of detecting fraud concerning electronic memory cards used in telephony |
DE19913326A1 (de) * | 1999-03-24 | 2000-10-05 | Giesecke & Devrient Gmbh | Vorrichtung zur Prüfung der Echtheit eines tragbaren Datenträgers |
US6462554B2 (en) | 2000-02-15 | 2002-10-08 | Intel Corporation | System and method for deterring operation of a system outside a specified frequency range |
EP2722788A1 (fr) * | 2012-10-18 | 2014-04-23 | Wincor Nixdorf International GmbH | Dispositif de lecture d'une carte à puce et procédé de détection d'un module de skimming |
EP3422260A1 (fr) * | 2017-06-29 | 2019-01-02 | NCR Corporation | Détection de manipulation par carte à puce |
US10592904B2 (en) | 2017-06-29 | 2020-03-17 | Ncr Corporation | Card shimmer detection |
Also Published As
Publication number | Publication date |
---|---|
EP0447686A1 (fr) | 1991-09-25 |
AU6842590A (en) | 1991-08-08 |
DE69022976T2 (de) | 1996-05-30 |
EP0447686B1 (fr) | 1995-10-11 |
AU630526B2 (en) | 1992-10-29 |
DE69022976D1 (de) | 1995-11-16 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: ALCATEL N.V., STRAWINSKYLAAN 341, 1077 XX AMSTERDA Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNORS:TAEYMANS, JEAN R.J.M.T.;NEUTJENS, GUSTAAF W.T.;SPOORMANS, ROBERTUS J.E.;REEL/FRAME:005613/0932 Effective date: 19901206 |
|
FEPP | Fee payment procedure |
Free format text: PAYOR NUMBER ASSIGNED (ORIGINAL EVENT CODE: ASPN); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY |
|
FEPP | Fee payment procedure |
Free format text: PAT HLDR NO LONGER CLAIMS SMALL ENT STAT AS INDIV INVENTOR (ORIGINAL EVENT CODE: LSM1); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY |
|
FPAY | Fee payment |
Year of fee payment: 4 |
|
REMI | Maintenance fee reminder mailed | ||
LAPS | Lapse for failure to pay maintenance fees | ||
FP | Lapsed due to failure to pay maintenance fee |
Effective date: 20000616 |
|
STCH | Information on status: patent discontinuation |
Free format text: PATENT EXPIRED DUE TO NONPAYMENT OF MAINTENANCE FEES UNDER 37 CFR 1.362 |